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TitleA comparison of cross-track ion drift measured by the swarm satellites and plasma convection velocity measured by SuperDARN
AuthorKoustov, A V; Lavoie, D B; Kouznetsov, A F; Burchill, J K; Knudsen, D J; Fiori, R A D
SourceJournal of Geophysical Research, Space Physics vol. 124, A07307, 2019 p. 1-15, https://doi.org/10.1029/2018JA026245
Year2019
Alt SeriesNatural Resources Canada, Contribution Series 20190130
PublisherAmerican Geophysical Union (AGU)
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®); html
Subjectsgeophysics; extraterrestrial geology; Science and Technology; Nature and Environment; remote sensing; satellite imagery; radar methods; geomagnetism; geomagnetic fields; geomagnetic variations; ionosphere; convection; magnetosphere; Super Dual Auroral Radar Network (SuperDARN); geological hazards; Swarm A satellite; Swarm B satellite; space weather; solar wind; interplanetary magnetic field; plasma flow
Illustrationsgraphs; geoscientific sketch maps; plots; tables; time series
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
Released2019 05 17
AbstractCross-track ion drifts measured by the Swarm A satellite are compared with collocated line?of?sight Super Dual Auroral Radar Network (SuperDARN) velocities in approximately the same directions. More than 200 Swarm A passes over four polar cap SuperDARN radars in the Northern and Southern Hemispheres are considered. Overall, the Swarm-based velocities are larger than the SuperDARN velocities; the slope of the best fit line to the data is ~0.67. Somewhat stronger differences are found when Swarm A measurements for the entire year 2016 are compared with SuperDARN vector data from global-scale convection maps. Swarm ion drift data demonstrate known features of the high-latitude convection patterns, for example, reverse convection cells at interplanetary magnetic field Bz > 0. The latitudes of the convection reversal boundary inferred from SuperDARN are found to be in reasonable agreement with those determined from Swarm A and Swarm B, with Swarm?based latitudes occurring roughly 1° more equatorward, typically.
GEOSCAN ID314819